Isak, 17, regarded as one of Sweden's most exciting attacking talents, has put pen to paper on a long-term contract at the SIGNAL IDUNA PARK, the details of which will remain undisclosed at least until FIFA ratify the deal, given Isak’s young age.

Watch: Isak explains his decision to join Dortmund ahead of a host of European suitors:

Regarded as the long-term successor to Zlatan Ibrahimovic, Isak recently became Sweden's youngest-ever goalscorer and has scored 10 goals and picked up one assist in 24 league games for Solna so far this season.

"Alexander Isak is a high-calibre talent who was wanted by numerous top European clubs,” said BVB's sporting director Michael Zorc. “We are very glad that he has decided to sign for Borussia Dortmund. BVB is just as convinced as the player that this transfer is a great one.”